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Is high milage oil necessary?

Posted on 12/3/14 at 10:32 pm
Posted by TigerTatorTots
The Safeshore
Member since Jul 2009
80802 posts
Posted on 12/3/14 at 10:32 pm
My 2.0L turbo Sonata is approaching 115,000 miles. Car is 3.5 years old with 80-85% of the miles driven being highway. I get my oil changed every 5000 miles and replace the engine air filter every 15000-20000 miles. I just changed the spark plugs for the first time at 110,000 miles. No other maintenance has been performed and it runs like the day I got it with no issues.

A) Is high milage oil needed now that I'm over the 100,000mile mark
B) Do you suggest any other preventative maintenance?
Posted by DownshiftAndFloorIt
Here
Member since Jan 2011
66763 posts
Posted on 12/3/14 at 10:35 pm to
1) nah. Keep doing what you're doing

2) do what the owners manual says.
Posted by Spankum
Miss-sippi
Member since Jan 2007
56105 posts
Posted on 12/3/14 at 10:40 pm to
no, high mileage oil is nothing more than a sales gimmick...if you decide that you have to do something, just go to a heavier weight of oil...but that shouldn't be necessary either...

one thing that you should do at 100K is to flush your coolant system...also may want to look at changing all belts and hoses if you plan to keep the vehicle a while...
Posted by jimbeam
University of LSU
Member since Oct 2011
75703 posts
Posted on 12/3/14 at 10:50 pm to
230xxx

Nothing different for my truck
Posted by Clames
Member since Oct 2010
16635 posts
Posted on 12/3/14 at 11:14 pm to
High mileage oils have extra seal swelling agents that could help some engines with small seal leaks. Problem is once you use them and the seals swell they will wear in to that new size so you are stuck using that oil. If your engine isn't leaking or consuming an inordinate amount of oil then stay away from it.
Posted by KingRanch
The Ranch
Member since Mar 2012
61614 posts
Posted on 12/4/14 at 7:07 am to
No, my work car has 120k and the oil only gets changed when the computer tells me to. It's usually between 7k and 10k intervals.
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